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241 carbon steel ansi b16.5 class 150 weld neck flange products are offered for sale by suppliers on Alibaba.com, of which flanges accounts for 46%. A wide variety of carbon steel ansi b16.5 class 150 weld neck flange options are available to you, such as iso, din and gb.You can also choose from stainless steel, custom and carbon steel carbon steel ansi b16.5 class 150 weld neck flange,as well as from industrial, connect, and pipeline carbon steel ansi b16.5 class 150 weld neck flange,and whether carbon steel ansi b16.5 class 150 weld neck flange is standard, or nonstandard.